I hope you are all doing alright.

Is it possible to connect a gform entry to a database created with Python and stored in my PC with a little variation of the following code?

add_action("gform_after_submission_1", "input_fields", 10, 2);
function input_fields($entry, $form)
{$password = "password";$username = "username";$servername = "localhost";$dbname = "db";$fname = $entry["12.3"];$lname = $entry["14.6"];$email = $entry["4"];$address1 = $entry["5.1"];$address2 = $entry["15.2"];$city = $entry["16.3"];$state = $entry["18.4"];$zip = $entry["17.5"];$bbd = $entry["7"];$upc = $entry["6"];$subject = $entry["10"];$question = $entry["2"];$con=mysqli_connect($servername, $username, $password, $dbname);
mysqli_query($con,"INSERT INTO wp_contacts (id, name, last_name, 
state, city, address, address_2, bbd, subscribe, upc, email, subject, 
comments, phone, user_ip, answer, answered_by, zipcode, category_id, 
active, contact_captcha, answered_date, dept, computer_name, created) 
VALUES ('', '$fname', '$lname', '$state', '$city', '$address1', 
'$address2', '$bbd', '', '$upc', '$email', '$subject', '$question', 
'', '', '', '', '$zip', '', '', '', '', '', '', '')");
}

I have tried creating a snippet with the following PHP code:

add_action("gform_after_submission_1", "input_fields", 10, 2);
function input_fields($entry, $form)
{
$dbname = "forms.db";
$fname = $entry["12.3"];
$lname = $entry["14.6"];$con=mysqli_connect($fileadres);
mysqli_query($con,"INSERT INTO vragenlijst (f_name, l_name,) 
VALUES ('$fname', '$lname');}

Any help will be much appreciated.

This should definitely be possible! I think the best option for you would be to implement a custom Feed. Feeds essentially allow you to pipe any data from a form entry to another location, in your case, the local DB you created in Python.

In order to facilitate this, you'd likely want to create a new GFFeedAddon class. This class provides methods to do all sorts of add-on related things, but specifically you'll want to look at overriding the process_feed() method (scroll down to the "Processing Feeds" section of the docs page I linked above).

Within this method, you'll have access to all of the values submitted, which you can access via $this->get_field_value(). Once you have the values you want to work with, it's just a matter of connecting to your local Python database using whatever method you want and storing the values you retrieved from the entry.